{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Aim : Aim of this study was to investigate whether GPR7 gene mutations can be detected in human subjects and , in that event , if they are differently distributed among lean and obese subjects ."}
{"Chemical": []}